root/ompi/mca/io/romio321/romio/mpi-io/iread_at.c

DEFINITIONS

1. MPI_File_iread_at

   1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
   2 /* 
   3  *
   4  *   Copyright (C) 1997 University of Chicago. 
   5  *   See COPYRIGHT notice in top-level directory.
   6  */
   7 
   8 #include "mpioimpl.h"
   9 
  10 #ifdef HAVE_WEAK_SYMBOLS
  11 
  12 #if defined(HAVE_PRAGMA_WEAK)
  13 #pragma weak MPI_File_iread_at = PMPI_File_iread_at
  14 #elif defined(HAVE_PRAGMA_HP_SEC_DEF)
  15 #pragma _HP_SECONDARY_DEF PMPI_File_iread_at MPI_File_iread_at
  16 #elif defined(HAVE_PRAGMA_CRI_DUP)
  17 #pragma _CRI duplicate MPI_File_iread_at as PMPI_File_iread_at
  18 /* end of weak pragmas */
  19 #elif defined(HAVE_WEAK_ATTRIBUTE)
  20 int MPI_File_iread_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype,
  21                       MPIO_Request *request) __attribute__((weak,alias("PMPI_File_iread_at")));
  22 #endif
  23 
  24 /* Include mapping from MPI->PMPI */
  25 #define MPIO_BUILD_PROFILING
  26 #include "mpioprof.h"
  27 #endif
  28 
  29 #ifdef HAVE_MPI_GREQUEST
  30 #include "mpiu_greq.h"
  31 #endif
  32 
  33 /*@
  34     MPI_File_iread_at - Nonblocking read using explicit offset
  35 
  36 Input Parameters:
  37 . fh - file handle (handle)
  38 . offset - file offset (nonnegative integer)
  39 . count - number of elements in buffer (nonnegative integer)
  40 . datatype - datatype of each buffer element (handle)
  41 
  42 Output Parameters:
  43 . buf - initial address of buffer (choice)
  44 . request - request object (handle)
  45 
  46 .N fortran
  47 @*/
  48 int MPI_File_iread_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype, 
  49                       MPIO_Request *request)
  50 {
  51     int error_code;
  52     static char myname[] = "MPI_FILE_IREAD_AT";
  53 
  54 #ifdef MPI_hpux
  55     int fl_xmpi;
  56 
  57     HPMP_IO_START(fl_xmpi, BLKMPIFILEIREADAT, TRDTSYSTEM, fh, datatype,
  58                   count);
  59 #endif /* MPI_hpux */
  60 
  61 
  62     error_code = MPIOI_File_iread(fh, offset, ADIO_EXPLICIT_OFFSET, buf,
  63                                   count, datatype, myname, request);
  64 
  65     /* --BEGIN ERROR HANDLING-- */
  66     if (error_code != MPI_SUCCESS)
  67         error_code = MPIO_Err_return_file(fh, error_code);
  68     /* --END ERROR HANDLING-- */
  69 
  70 #ifdef MPI_hpux
  71     HPMP_IO_END(fl_xmpi, fh, datatype, count);
  72 #endif /* MPI_hpux */
  73 
  74     return error_code;
  75 }